I have an ETS but if you don't mind trimming your bumper support I guess Dinan's may be better due to larger core, less pressure drop and what I really like the aluminum shrouding that prevents air from passing around the core.

Dinan's FMIC is actually a Spearco unit with custom shrouding...nothing wrong with it, but the ETS 5" is a lot easier to install and the connector hardware replaces the more restrictive stock "ribbed" stuff. I went with the ETS 5" and have never looked back. Also, unless you plan on running 600+ HP tune level, a 7" FMIC is overkill - and it requires trimming, no matter which brand you buy. The key is the core design - bar and plate > tube and fin every time.

Well Everyone is going to tell you that whatever IC they have is the best one. Anyway when i did the research the HELIX FMIC was the best one, and one of the most expensive, but you do get what you pay for.